動詞 disadvantage:

1. put at a disadvantage; hinder, harm
   同義詞：disadvantage, disfavor, disfavour

形容詞 disadvantaged:

1. marked by deprivation especially of the necessities of life or healthful environmental influences
   同義詞：deprived

1. Tax laws that favored the privileged at the expense of the disadvantaged.
   以處于劣勢的人為代價而有利于擁有特權(quán)者的稅法
2. More state help is needed for the disadvantaged sections of the community.
   國家需要向社區(qū)的貧困階層提供更多救濟。

dis.ad.van.taged

adj.（形容詞）
Deprived of some of the basic necessities or advantages of life, such as adequate housing, medical care, or educational facilities.
處于不利地位的；貧困的：缺乏生活中的一些必需品或有利條件，如寬余的住房，醫(yī)療護理，或教育設(shè)備
Being at a disadvantage, especially with respect to competitive or opposing elements or forces:
處于弱勢的：處于不利條件下的，尤指相對于競爭或相反的因素或力量：
例句：
.We can`t have . . . disadvantaged conventional forces on one hand and strategic nuclear forces on the other.(Bernard Rogers)
.我們不可能…一方面有不利的常規(guī)部隊，而另一方面又有配有戰(zhàn)略核武器的部隊.(伯納德·羅杰斯)

n.(used with a pl. verb)（名詞）（與復(fù)數(shù)動詞連用）
Deprived people considered as a group.
弱勢群體：處于下層的人們

【引伸】
dis.advan.tagedness
n.（名詞）